This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A206992 #7 Jul 22 2025 19:54:15 %S A206992 44,1936,17460,329952,5517786,88819714,1482397764,24487141408, %T A206992 404028674322,6680807680870,110384929625108,1823827049092968, %U A206992 30138255315895530,497995973048057786,8228770269287650676 %N A206992 Number of nX6 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically. %C A206992 Column 6 of A206994 %H A206992 R. H. Hardin, <a href="/A206992/b206992.txt">Table of n, a(n) for n = 1..210</a> %e A206992 Some solutions for n=4 %e A206992 ..1..0..1..1..1..0....0..1..1..1..0..1....0..0..1..1..0..1....0..1..1..1..0..0 %e A206992 ..0..1..0..1..1..0....1..0..0..1..1..1....0..1..1..0..1..0....1..0..1..1..1..0 %e A206992 ..0..1..1..0..0..1....0..1..0..0..1..0....1..0..0..1..1..0....1..1..0..0..1..1 %e A206992 ..0..0..1..1..1..0....0..1..1..1..0..0....0..0..1..0..0..1....0..1..1..1..0..1 %K A206992 nonn %O A206992 1,1 %A A206992 _R. H. Hardin_ Feb 14 2012